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Simple CGT calculator

Estimate the capital gains tax on a single asset — bought once, sold once.

Asset type
$
$
$
$
Marginal rate
$

Estimated CGT payable

$22,200

Gross gain
$120,000
Holding period
882 days
50% discount applied
Yes — $60,000
Net taxable gain
$60,000
  1. 1

    Calculated cost base

    Purchase price ($500,000) plus purchase costs ($15,000).

    $515,000.00

  2. 2

    Calculated sale proceeds

    Sale price ($650,000) minus sale costs ($15,000).

    $635,000.00

  3. 3

    Calculated gross capital gain

    Sale proceeds minus cost base, over a holding period of 882 days.

    $120,000.00

  4. 4

    Applied the 50% CGT discount

    Held for 882 days (12+ months), so the 50% discount for individuals applies.

    $60,000.00

  5. 5

    Determined marginal tax rate

    Based on other taxable income of $80,000 plus this taxable gain, stacked against FY2025-26 resident brackets — a 37% marginal rate.

  6. 6

    Estimated CGT payable

    Net taxable gain of $60000.00 taxed at 37%.

    $22,200.00

Assumptions

  • Assumes the asset is held by an individual (the 50% discount does not apply to companies).
  • Assumes Australian tax residency for the full ownership period.
  • Capital losses are not offset against other income and are not carried forward in this calculator.
  • CGT is estimated by adding the net taxable gain to your other taxable income and applying FY2025-26 resident marginal tax rates — it is not a full tax return calculation.